蓝光热激子材料的研究进展  

Progress on Blue-Emitting Hot Exciton Materials

作　　者：连铭槟 叶泽聪 穆英啸 胡德华 刘源 张浩力 籍少敏[1] 霍延平[1] Lian Mingbing;Ye Zecong;Mu Yingxiao;Hu Dehua;Liu Yuan;Zhang Haoli;Ji Shaomin;Huo Yanping(School of Chemical Engineering and Light Industry,Guangdong University of Technology,Guangzhou 510006;School of Chemistry and Chemical Engineering,Lanzhou University,Lanzhou University,Lanzhou 730000)

机构地区：[1]广东工业大学轻工化工学院,广州510006 [2]兰州大学化学化工学院,兰州730000

出　　处：《有机化学》2023年第2期573-601,共29页Chinese Journal of Organic Chemistry

基　　金：国家自然科学基金(Nos.U2001222,21975055,21975053);广东省自然科学基金(No.2021A1515110417);广东省基础与应用基础研究基金(Nos.2022B1515020041,2019B1515120035);广州市基础研究计划基础与应用基础研究(No.202102020770)资助项目。

摘　　要：热激子荧光材料由于交错的能级排列,激子在电致发光过程中可由高位三重态通过反向系间窜跃转换到单重态,从而最大限度利用三重态激子,实现理论100%的最大内量子效率,这不仅突破了传统荧光材料和三重态-三重态上转换发光材料在激子利用上的限制,而且克服了热活化延迟荧光(TADF)材料在高电流密度下效率滚降严重的问题,因而在电致发光上显现出独特的优势.蓝光长期以来是有机光电全彩显示的短板.蓝光显示上,磷光材料和TADF材料的色纯度和稳定性往往不尽如人意,而热激子材料可实现更高品质的蓝光发射,即使在深蓝领域也能表现出不俗的器件性能.系统地综述了蓝光热激子材料的发光机理、设计准则以及近年来具有代表性的研究成果,并对其发展趋势进行展望.In hot exciton materials,the excitons from the high-lying triplet state(T_(n),n≥2)can be efficiently converted into the singlet state(S_(m),m≥1)via reverse intersystem crossing(RISC)process due to the staggered energy level arrangement,which maximizes the use of the triplet exciton and theoretically achieves a maximum internal quantum efficiency(IQE)of 100%.Hot exciton materials not only break the exciton utilization limitation of traditional fluorescent materials and triplet-triplet annihilation materials,but also overcome the serious efficiency roll-off of thermally activated delayed fluorescent(TADF)materials at high current density,exhibiting unique advantages in the electroluminescence.Blue light has long been the short board of the organic photoelectric full-color display.Compared with the phosphorescent and TADF materials with unsatisfying color purity and inferior stability,hot exciton materials can achieve higher-quality emission in blue devices,exhibiting excellent performance even in the deep-blue region.In this review,the representative blue-emitting hot exciton materials reported recently are summarized,the light-emitting mechanism and design strategy are elaborated,and a full vision of its development is made.

关 键 词：热激子 蓝光材料 有机电致发光 有机发光二极管 

分 类 号：TN383.1[电子电信—物理电子学]